During the police investigation, three male witnesses also came forward and were interviewed by authorities.

A country-wide outpouring of grief and anger followed Ms Dixon's death, over the right of Australian women to safely walk on the streets. Picture: 9NEWS. (AAP)Police have labelled the sexual assault as 'enormously concerning', given it occurred so closely to the death of Ms Dixon. Picture: 9NEWS. (AAP)

Earlier, Detective Steve Wilson described the alleged attack as “enormously concerning”, given the death of Melbourne comedian Dixon.

The 22-year-old’s body was found on a soccer pitch in Carlton just last week.